1440421201 has 4 divisors (see below), whose sum is σ = 1440718132. Its totient is φ = 1440124272.

The previous prime is 1440421193. The next prime is 1440421219. The reversal of 1440421201 is 1021240441.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 547606801 + 892814400 = 23401^2 + 29880^2 .

It is a cyclic number.

It is not a de Polignac number, because 1440421201 - 2³ = 1440421193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1440421601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141066 + ... + 150931.

It is an arithmetic number, because the mean of its divisors is an integer number (360179533).

Almost surely, 2^1440421201 is an apocalyptic number.

It is an amenable number.

1440421201 is a deficient number, since it is larger than the sum of its proper divisors (296931).

1440421201 is an equidigital number, since it uses as much as digits as its factorization.

1440421201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296930.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1440421201 is about 37952.8813267188. The cubic root of 1440421201 is about 1129.3533254008.

Adding to 1440421201 its reverse (1021240441), we get a palindrome (2461661642).

The spelling of 1440421201 in words is "one billion, four hundred forty million, four hundred twenty-one thousand, two hundred one".